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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Maywood Mutual Water Company #2

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.750 ppb82ND - 3.10 ppb
2015ND80ND
2016ND80ND
20170.275 ppb81ND - 2.20 ppb
2018ND80ND
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-063761-801-1020ND
2014-01-063761-800-0954ND
2014-04-073761-801-09162.90 ppb
2014-04-073761-800-09453.10 ppb
2014-07-073761-801-0946ND
2014-07-073761-800-1009ND
2014-10-063761-801-0914ND
2014-10-063761-800-0933ND
2015-01-053761-800-0912ND
2015-01-053761-801-0853ND
2015-04-153761-800-0911ND
2015-04-153761-801-0851ND
2015-07-063761-800-1053ND
2015-07-063761-801-1033ND
2015-10-053761-800-1036ND
2015-10-053761-801-1015ND
2016-01-043761-800-0930ND
2016-01-043761-801-1025ND
2016-04-043761-800-1014ND
2016-04-043761-801-0915ND
2016-07-053761-800-1115ND
2016-07-053761-801-1037ND
2016-10-033761-800-1126ND
2016-10-033761-801-1031ND
2017-01-043761-801-1235ND
2017-01-043761-800-1309ND
2017-04-033761-801-1015ND
2017-04-033761-800-1103ND
2017-07-053761-801-1128ND
2017-07-053761-800-1023ND
2017-10-033761-801-09452.20 ppb
2017-10-033761-800-0915ND
2018-01-103761-800-1019ND
2018-01-103761-801-0945ND
2018-04-103761-800-1052ND
2018-04-103761-801-1110ND
2018-07-033761-801-0855ND
2018-07-033761-800-0908ND
2018-10-023761-801-0954ND
2018-10-023761-800-1035ND
2019-01-093761-801-0803ND
2019-01-093761-800-1016ND
2019-04-033761-801-1055ND
2019-04-033761-800-1145ND
2019-07-113761-801-0949ND
2019-07-113761-800-1030ND
2019-10-013761-801-1056ND
2019-10-013761-800-1005ND